My Ben 10 Sprites
I have finished Ben Tenneyson's complete sprite sheet (forgot to make him kick), and added his box holograms, along with a couple of his aliens, Heatblast and Feedback.
Ben Tenneyson
I kinda mixed Ben's look in Omniverse with his Ben 10 Ultimate Alien hairstyle and didn't put facial features because it was to hard, and i thought it looked better without them, thought it does look derpy (as quoted by Nick below).
Heatblast and Feedback
I did the same to Heatblast and removed his face. I also kept the tiny Omnitrix, too. I did the same to Feedback, just didn't remove his face (it gives him his personality :P).
Grey Matter and Wildmutt
Grey Matter pretty much taken from my old emoticon design of Grey Matter, along with a mini-up to scale Grey Matter. Wildmutt, however keeps his teeth, prior to his powers.
Box Holograms
I added box holograms, made out of the Ben 10 Alien emotes on my userpage that i made. It also confirms that Wildmutt, Fourarms, Grey Matter, XLR8, Upgrade, Diamondhead, Stinkfly, and Crashopper might also appear, along with a couple other aliens.
I will make more aliens soon...